it is one of the deadliest shooting rampages in u.s. history. all morning, we'll bring you updates on the victims and the investigation. we now know the name of the newtown shooter. we'll dig in on what was behind his monstrous act and a second crime scene tied to the first. what investigators found when they went to the suspected gunman's house. >>> i'm here in newtown, pennsylvania. behind me some distance is the school at which this tragic shooting took place. we have this story covered from all angles. i want to bring in my colleague john berman in newtown, in the town square. john, bring us up to speed on what we've seen since yesterday evening. >> hey, ali, i'm standing in front of the st. rose of lima church where last night there was an emotional vigil with about 1,000 people here. residents poured in for the 26 victims of this tragic attack. of course, 20 children were killed, six adults, all at the elementary school. and we're learning more about the shooter, which we're going to get into in a moment. but first, let's focus right now o